NCIt definition : An abnormality often noted in pap smears. Koilocytotic atypia affects the squamous
epithelium of the transformation zone. The cells involved show cytoplasmic vacuolization
that might be related to their ability to store glycogen. The most characteristic
feature of this condition is the peripheral cytoplasmic condensation associated with
an increase of tonofilaments. (from Acta Cytol 1981;25:377-82);